Franco then took the hairstyle a step further, posting another Instagram picture of his head with popular '90s boy bands like *NSYNC, 98 Degrees and the Backstreet Boys.

"I'm in ALL the BOYBANDS! Meeeeeyooowwwwww!" Franco captioned.

He isn't the first celebrity to mix up his hair as of late. Adam Levine also bleached his hair this past May. Luckily, he decided to go back to his natural, dark roots prior to his recent wedding to Behati Prinsloo.

Levine didn't explain the hairdo, but Prinsloo captioned the photo on her Instagram with, "Don't ask too many questions, We are only preparing for the apocalypse. or maybe fight club."

Levine did comment on the hairstyle on Twitter, following its debut on The Voice, which earned the singer a lot of flak. "I hope people understand that when they say my hair looks creepy I take that as the highest compliment."

We think Franco would agree with Levine.

Franco is no stranger to mixing up his hairstyles. How could we forget those infamous braids that were a character in their own right in his film, Spring Breakers. Or what about that long, stringy surfer look he rocked in Pineapple Express?

The motive behind his new bleach-blond hair is still a mystery. Could Franco be prepping for a film role? Or was he just feeling some new summer highlights and went a little extreme?